Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6616712 | Use of compositions containing bisazo compounds for detecting fissures | Karin H. Beck, Christos Vamvakaris, Karl-Heinz Etzbach, Claudia Krah | 2003-09-09 |
| 6028179 | Trisazo dyes | Gunther Lamm | 2000-02-22 |
| 5827332 | Azo dyes and a method of making a hydrocarbon using an azo dye | Georg Zeidler, Claudia Krah, Karin H. Beck, Udo Mayer | 1998-10-27 |
| 5487770 | Detection of marked mineral oils and novel azo dyes | Rainer Dyllick-Brenzinger, Friedrich-Wilhelm Raulfs, Ulrike Schlosser, Karin H. Beck | 1996-01-30 |
| 4519003 | Video recorder including a plurality of operating elements | — | 1985-05-21 |